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NOTICE D'UTILISATION ET DE DEPANNAGE / OPERATION & MAINTENANCE INSTRUCTIONS
AMPLIFICATEURS / AMPLIFIERS
· Before connecting the sources to the appropriate inputs, according to manufacturer's specifications, check the
quality of links & cable layouts . Check if coupling is correct (signal levels, impedances, balanced,
unbalanced ),
· Before connecting the amplifier to mains, make sure that the amplifier power transformer tap is set up
according to mains voltage,
· When amplifier is switched on, LED N° 7 (Fig : 1), will turn on,
· Set up inputs level controls in order to get the appropriate sound level, while avoiding any signal clipping,
2 TROUBLE SHOOTING
1. Amplifier off :LED N° 7 (Fig : 1) off :
Check mains,
Disconnect speakers lines and make sure that short circuit or overloading is not happening,
· If fault is not removed, check for appropriate ventilation,
2. Amplifier out of order
Check critical voltage levels as per (Fig : 8).
3. External 24 V DC not available
Check Fuse F2 (Fig : 3)
4. In case of electronic oscillation, check the links (grounding, shielding, environmental perturbation due to cables
layout near other cables or equipments).Activation of the low pass filter (J28) (Fig : 3) may solve, in some cases,
problems due to links.
5. In case of hums or high noise level, check the continuity of grounds (links,frame and chassis).
6. The use of input transformers or a microphone with preamplifier shall reduce hums and oscillation due to the
links .
M E R L A U D
e r l a u d
9 rue de La Briqueterie - P.A.E. des FAUVETTES - 95330 DOMONT (FRANCE)
Tel. 01 39 91 77 78 - Fax 01 39 91 90 66 -
DO3-51-2446-AMG-EC-V180203
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www.merlaud.com
- merlaud@merlaud.com
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